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Sendgrid blocking some addresses

Hi there,

I´m having issues with Sendgrid since sometimes I get a “block” in the activity feed so the email is not sent.

Does anyone know how to solve this?

Thanks a lot.

Hey @ryanck,

Take a look at SendGrid’s documentation on Blocks. :slight_smile:

Thanks @iamsalar,

I´ve seen that, the problem is that I don´t know how to fix this.

Is there any way?

SendGrid seems to suggest investigating the cause of the Block. What have you discovered there?

For now I´ve just discovered that it happens with hosted email accounts but for gmail, yahoo, hotmail, outlook, … it works.

The question was more so about the reason for the block. :slight_smile:

From the SendGrid documentation: “The “Reason on the Block” will clarify what the exact reason is.”

Ah yeah I´ve got an 550 error all the time.

For reference, here’s what SendGrid defines as Error Code 550:

The user’s mailbox was unavailable. Usually because it could not be found, or because of incoming policy reasons.


550 5.1.1 The email account that you tried to reach does not exist. Please try double-checking the recipient’s email address for typos or unnecessary spaces.
550 Requested action not taken: mailbox unavailable
550 5.1.1 <[email protected]>: Recipient address rejected:
What to do with this response:It’s probably a good idea to take addresses that throw this response off of your main list, as it’s likely a bogus address or one that was mistyped.

Seems to be tied directly to recipient fields. We’ve personally never had a blocking issue before.
Reach out to SendGrid to get their take on it and see where it goes from there.

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Yeah I´ll do that.

I´m thinking this Sendgrid thing is not as easy as I thought it will be.